[Axiom-developer] Interpreter changes

[Tim Daly]

All of the code for the interpreter proper is now pure lisp code.

The code is being rewritten and refactored in detail, documented,
and added to the interpreter book as literate code. The src/interp
directory should be gone in the near future.

There are three side effects of this change.

First, the VMLisp/MACLISP/etc legacy support will be rewritten into
pure common lisp.

Second, the boot translator code is no longer needed and will be
removed in the coming weeks along with the src/boot directory.

Third, the Aldor hooks are being removed since it is clear that
Aldor will never become free and open source. Instead of doing the
translation of this legacy code the effort will be spent to improve
and document the existing compiler.

Tim